Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
hieu xanh » chieu xanh, hieu manh, hieu nganh
tung tam » trung tam, vung tam, dung tam
tam dang » nam dang, tam dan, tran dang
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
toan ban » van ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu xanh) or (chieu sach)) - thanh tung tam dang ((cong tan) or (cong san)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (chieu sach)) - thanh tung tam dang ((cong tan) OR (cong san)) toan ban.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) or (chieu sach)) - thanh tung tam dang ((cong tan) or (cong san)) toan ban*.